In order to get moving on your board, you push yourself away from the ground using your foot, hence the term pushing. A regular rider (> Fig. 01) pushes himself away with the right foot while a goofy rider (> Fig. 02) pushes himself away with the left foot. It might not be politically correct, but when a regular rider uses the front left foot or a goofy rider uses the front right one, it is called mongo push (> Fig. 03). This kind of push is relatively common with beginners but it is kind of frowned upon with advanced skaters for aesthetic reasons. Therefore, most skaters avoid getting into the habit of mongo pushing right from the start.